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Why does pthread_cond_wait have spurious wakeups?
...ion is given by David R. Butenhof in "Programming with POSIX Threads" (p. 80):
Spurious wakeups may sound strange, but on some multiprocessor systems, making condition wakeup completely predictable might substantially slow all condition variable operations.
In the following comp.programming.th...
Add disabled attribute to input element using Javascript
...t").attr("disabled", true); as of... I don't know any more.
It's December 2013 and I really have no idea what to tell you.
First it was always .attr(), then it was always .prop(), so I came back here updated the answer and made it more accurate.
Then a year later jQuery changed their minds again and...
Inherit docstrings in Python class inheritance
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answered Jan 8 '10 at 4:51
John FeminellaJohn Feminella
272k3939 gold badges320320 silver badges337337 bronze badges
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ByteArray 扩展 - 字节数组处理工具 · App Inventor 2 中文网
...置第一个项目的索引。可能值为1（App Inventor常规值）或0（Java/C常规值），默认值为1。
字节序
获取或设置字节序，决定多字节数据的存储顺序。可选值为”BigEndian”（大端序）或”LittleEndian”（小端序），默认为”BigEndian”...
How exactly does tail recursion work?
...mply able to transform this
int fac_times (int n, int acc) {
if (n == 0) return acc;
else return fac_times(n - 1, acc * n);
}
into something like this:
int fac_times (int n, int acc) {
label:
if (n == 0) return acc;
acc *= n--;
goto label;
}
...
Delete all but the most recent X files in bash
...here's no input.
If you have BSD xargs (including on macOS), you can use -0 to handle NUL-separated input, after first translating newlines to NUL (0x0) chars., which also passes (typically) all filenames at once (will also work with GNU xargs):
ls -tp | grep -v '/$' | tail -n +6 | tr '\n' '\0' | ...
Access an arbitrary element in a dictionary in Python
... |
edited May 15 at 15:06
gmelodie
19011 silver badge1616 bronze badges
answered Jun 22 '10 at 23:28
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What kind of leaks does automatic reference counting in Objective-C not prevent or minimize?
...e-C mailing list, where he lists many advantages of ARC over Objective-C 2.0 garbage collection. I've run into several of the GC issues he describes.
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Is there a way to check if a file is in use?
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answered Jun 2 '09 at 1:20
ChrisWChrisW
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Can I run javascript before the whole page is loaded?
...ng is complete.)
This wasn't available when I first wrote this answer in 2010, but here in 2020, all major modern browsers support modules natively, and if you need to support older browsers, you can use bundlers like Webpack and Rollup.js.
Use the defer attribute on a classic script tag:
<scr...